Open in Bus 2 Main Bus Line [04/2018 - 08/2020]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A49 No. 2 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 2 CAN Junction Connector)	*b	to No. 4 CAN Junction Connector
   *c	to ECM	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   A49-10 (CANH) - A49-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 4 CAN junction connector
   A49-11 (CANH) - A49-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	ECM

   Result

   Result	Proceed to
   OK	A
   NG (Line to ECM)	B
   NG (Line to No. 4 CAN junction connector)	C

Result: 

A 

REPLACE NO. 2 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the A49 No. 2 CAN junction connector.
2. Disconnect the A18 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A18-13 (CANH) - A18-26 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to ECM)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [04/2018 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 2 CAN JUNCTION CONNECTOR) 

1. Reconnect the A49 No. 2 CAN junction connector.
2. Disconnect the G96 No. 4 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to No. 4 CAN Junction Connector)

   *b

   to No. 2 CAN Junction Connector

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G96-11 (CANH) - G96-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) 

Result: 

OK 

See step  4

1. Reconnect the G96 No. 4 CAN junction connector.
2. Disconnect the G95 No. 4 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to No. 4 CAN Junction Connector)

   *b

   to Central Gateway ECU (Network Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G95-1 (CANH) - G95-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE NO. 4 CAN JUNCTION CONNECTOR 

Result: 

NG 

See step  5

1. Reconnect the G95 No. 4 CAN junction connector.
2. Disconnect the G52 central gateway ECU (network gateway ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU))

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G52-18 (CA4H) - G52-17 (CA4L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [04/2018 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 4 CAN JUNCTION CONNECTOR)